US Bridges

850 West Road over I 84;850 West RD Gs

Fair

Minidoka County, Idaho · 2.3 W. Burley · Structure no. 000000000025310

Built
1966
59 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
220 ft
5 main spans
Daily traffic
580
2023 count
Owner
State
State Highway Agency

About this bridge

850 West Road over I 84;850 West RD Gs is a prestressed concrete stringer/multi-beam or girder carrying 850 West Road over I 84;850 West RD Gs in Minidoka County, Idaho. It was built in 1966, so it is 59 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 580 vehicles a day, roughly 9% of them trucks, projected to reach 870 by 2042. The structure is 220 ft (67.1 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
Carries850 West Road
CrossesI 84;850 West RD Gs
Location2.3 W. Burley
RouteCounty Highway 0
CountyMinidoka County
StateIdaho
Coordinates42.56853, -113.83317
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length220 ft (67.1 m)
Longest span49 ft (14.9 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic580 (2023)
Projected traffic870 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.1 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 850 West Road over I 84;850 West RD Gs built?

It was built in 1966, making it 59 years old in 2025.

What condition is 850 West Road over I 84;850 West RD Gs in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does 850 West Road over I 84;850 West RD Gs carry?

About 580 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is 850 West Road over I 84;850 West RD Gs?

The structure is 220 ft (67.1 m) long with a longest span of 49 ft (14.9 m) and a deck 29 ft wide.

Who owns 850 West Road over I 84;850 West RD Gs?

It is owned by the State Highway Agency.